_dta:
  1.  by Jean Roth , jroth@nber.org , 29 Sep 2015

  obs:       549,477                          
 vars:             2                          29 Sep 2015 21:36
 size:    16,484,310                          (_dta has notes)
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              storage   display    value
variable name   type    format     label      variable label
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npi             str10   %10s                  National Provider Identifier (NPI)
aocredential    str20   %20s                  Authorized Official Credential Text
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Sorted by:  npi